reactions periodic table & elements physical chemical changes compounds & mixtures physical...
TRANSCRIPT
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Reactions Periodic Table & Elements
Physical Chemical Changes
Compounds & Mixtures
Physical Chemical properties
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•This law says that atoms cannot be created or destroyed in a reaction
??10 points
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Law of conservation of MASS/MATTER
10 points
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•Atoms re-arrange to form new compounds during…?
??
20 points
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During a chemical reaction
20 points
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• The following is a chemical reaction:
A) Dissolving sugarB) Rusting nailC) Glass meltingD) Alcohol vaporizing
30 points
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•B) Nail Rusting
•30 points
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•CH4 + 2O2 CO2 + 2H2OThis is a chemical reaction because:A)It is balancedB)A new substance is formedC)It creates a gas and a solidD)There are 2 substances on the
reactant side
40 points
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B) A new substance is formed40 points
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CH4 + 2O2 CO2 + 2H2O
Why do the O2 and H2O have a “2” in front of them?
50 points
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To BALANCE the reaction (same amount of atoms in and out)
50 points
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CH4 + 2O2 CO2 + 2H2OWhich is a PRODUCT in this reaction?
A)O2
B)HC)CO2
D)CH4
60 points
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•C) CO2
60 points
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•These elements are VERY reactive metals:–A) Alkaline Earth Metals–B) Noble gases–C) Transition Metals–D) Alkali Metals
10 points
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–D) Alkali Metals
10 points
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•These elements are ductile, malleable, conduct heat and electricity, and are useful for building things
20 points
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•METALS
•20 points
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This metalloid is used in making glass and computer chips:
30 points
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Silicon
30 points
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This group of nonmetals includes gases that do not react easily with other elements:
40 points
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40 points
Noble gases
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•Elements MOST closely related to each other are arranged in ______________ on the periodic table.
50 points
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50 points
GROUPS
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Most of the elements are:A) Natural nonmetalsB) Natural metalsC) Synthetic nonmetalsD) Synthetic metals
60 points
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60 points
B) Natural metals
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•This type of change causes NEW substances to be formed
10 points
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Chemical changes
10 points
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•This type of change does not form new substances, and includes phase changes
20 points
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Physical Changes
20 points
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•Which is PHYSICAL change?A)Iron rustingB)Hydrogen + oxygen waterC)Sulfur and oxygen forming Sulfur dioxideD) Liquid nitrogen becoming a gas at room temperature
30 points
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Liquid nitrogen becoming a Gas at room temperature
30 points
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When you stir salt into water, you form:
A)A new substanceB)A new compoundC)A solutionD)A new element
40 points
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C) A solution
40 points
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•Which 2 materials form a new substance when combined?
A)Water and Kool-Aid powderB)Baking soda and vinegarC)Iron nails and penniesD)Salt and pepper
50 points
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B) Baking soda and vinegar
50 points
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60 points
Which is a CHEMICAL change?
A) spreading mustard
B) mixing spices
C) cutting a lawn
D) making a cake
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D) making a cake
60 points
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•Compounds are different from mixtures because:
10 points
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10 points
COMPOUNDS: chemically attached
MIXTURES: physically mixed, not chemically attached
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H2SO4 has ___ total atoms?
20 points
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7 atoms inH2SO4
20 points
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Which is/are a compound?
A) Berkyllium
B) Hyrogen
C) Propane
D) Water30 points
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C) Propane
C3H8
D) Water
30 points
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HOW are compounds formed?
40 points
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Atoms CHEMICALLY attach to each other
40 points
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50 points
A substance is formed from 2 substances physically joined – this is a/an:
A) element
B) mixture
C) compound
D) atom
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50 points
B) mixture
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What is the chemical formula for GLUCOSE (a
simple sugar)?
60 points
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C6H12O6
60 points
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•This property explains how tightly packed atoms are
10 points
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DENSITY10 points
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Soda, sweet tea, and salt water are all what type of matter?
20 points
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Homogeneous SOLUTIONS20 points
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Water and salt water have different melting and boiling points because...?
30 points
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They are different substances.
Every substance has its own M. & B. points
30 points
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Water molecules begin to speed up, so that they can now move past each other. What phase transition is occurring?
A) freezing
B) melting
C) evaporating
D) condensing
40 points
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B) melting
40 points
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Which is/are insoluble in water?
A) sugar
B) sand
C) oil
D) drink mix
50 points
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B) sand
C) oil
50 points
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Which is a NATURAL HOMOGENEOUS solution?
A) salt
B) soda
C) steel
D) blood
80 points
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D) Blood
80 points